Microtest 7140 Power Analyzer

The Microtest 7140 is a single-phase AC/DC power analyzer delivering 0.05% basic power accuracy across a measurement bandwidth from DC and 0.2 Hz to 100 kHz. With a 500 kSPS sampling rate, direct input up to 800 V and 30 A, and 100th-order harmonic analysis, the 7140 provides comprehensive power measurement capability for efficiency testing, standby power compliance, and power quality analysis in a compact instrument.

Feature	Specification
Measurement Type	Single-phase AC/DC power
Bandwidth	DC, 0.2 Hz to 100 kHz
Basic Accuracy	0.05% (power)
Sampling Rate	500 kSPS
Voltage Input	Up to 800 V direct
Current Input	Up to 30 A direct
Low Current Range	5 mA range available
Power Resolution	10 uW
Harmonics	Up to 100th order
Integration	Simultaneous integration measurement
Display	4.3” TFT LCD (numeric + graphical)
Parameters	V, I, P, PF, VA, VAR, Wh, frequency, THD

The 5 mA current range with 10 uW power resolution enables low standby power testing for regulatory compliance with international energy efficiency standards including IEC 62301, Energy Star, and ErP Directive Lot 6. Simultaneous integration measurement accumulates energy consumption over defined test intervals for energy efficiency calculations without separate instrumentation. The 100th-order harmonic analysis measures voltage and current harmonic distortion for power quality assessment per IEC 61000-3-2.

Measurement Applications

• Power supply efficiency — Measure input power, output power, and calculate efficiency across load conditions for switch-mode power supplies, LED drivers, and battery chargers.
• Standby power compliance — Verify sub-watt standby consumption for consumer electronics, home appliances, and IT equipment against international energy efficiency regulations.
• Motor and drive testing — Analyze power consumption, power factor, and harmonic content of motor drive systems under varying speed and load conditions.
• Inverter and converter characterization — Measure input/output power and efficiency of DC-DC converters, DC-AC inverters, and AC-DC rectifiers across the operating envelope.
• Harmonic analysis — Quantify voltage and current harmonic distortion for EMC pre-compliance and power quality assessment.

The 4.3-inch TFT LCD displays both numeric measurement values and graphical waveform/harmonic bar charts simultaneously, providing immediate visual feedback during test. The compact form factor fits bench-top, rack-mount, and ATE integration scenarios.

Watch the Microtest 7140 Power Analyzer on YouTube

GSAS Micro Systems provides Microtest 7140 power analyzers with application consulting, test fixture guidance, and calibration services for Indian power electronics manufacturers and test laboratories.